Answer: A. Phenotype
Explanation:
Phenotype: the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.
Genotypes produce phenotypes.
Photosynthesis puts oxygen in the atmosphere.
Answer: Negative feedback serves to reduce an excessive response and to keep a variable within the normal range. Negative feedback loops control body temperature and the blood glucose level.
The Answer is A but im only about 5% sure about my answer
